Departamento de Química e Ciências Ambientais, Laboratório de Estudos em Ciências Ambientais, Instituto de Biociências, Letras e Ciências Exatas, UNESP, Universidade Estadual Paulista, Campus São José do Rio Preto, Cristóvão Colombo, 2265, São José do Rio Preto, São Paulo State, 15054-000, Brazil.
Laboratório de Materiais Funcionais Avançados (LaMFA), Departamento de Física, Universidade Federal do Ceará, P.O. Box 6030, Fortaleza, Ceará, 60455-900, Brazil.
Environ Sci Pollut Res Int. 2019 Mar;26(9):9137-9145. doi: 10.1007/s11356-019-04341-9. Epub 2019 Feb 4.
Hydrothermal carbonization transforms biomass into value-added material called hydrochar. The release of nutrients (P, N, Ca, Mg, and K) and organic carbon (TOC) from hydrochar in different extractive solutions was investigated in this study. Two sets of hydrochar were produced: (i) hydrochar prepared from sugarcane bagasse and vinasse mixture (BV-HC) and (ii) hydrochar prepared by the addition of HPO to this mixture (BVA-HC). Both hydrochar types released significative amounts of nutrient and organic carbon, mainly Ca (5.0 mg g) in the mixture (KCl, KSO, NaOH, 1:1:1) extractive solution and TOC (72.6 mg g) in the NaOH extractive solution, for BV-HC. Nutrient release was influenced by pH and ionic strength. The release of P, Ca, and Mg was affected by the presence of insoluble phosphate phases in BVA-HC. The release of nutrients P, N, Ca, Mg, and K and organic carbon demonstrated that hydrochar has potential for soil application purposes.
水热碳化将生物质转化为称为水炭的增值材料。本研究考察了不同提取溶液中来自水炭的养分（P、N、Ca、Mg 和 K）和有机碳（TOC）的释放。制备了两组水炭：（i）由甘蔗渣和酒糟混合物制备的水炭（BV-HC）和（ii）通过向该混合物中添加 HPO 制备的水炭（BVA-HC）。两种水炭类型都释放出大量的营养物质和有机碳，主要是 Ca（5.0mg g）在混合提取溶液（KCl、KSO、NaOH，1:1:1）和 TOC（72.6mg g）在 NaOH 提取溶液中，对于 BV-HC。养分释放受 pH 值和离子强度的影响。BVA-HC 中不溶性磷酸盐相的存在影响 P、Ca 和 Mg 的释放。养分 P、N、Ca、Mg 和 K 的释放以及有机碳表明水炭具有用于土壤应用的潜力。
